Wireless power transfer techniques to transfer energy have been widely adopted by wireless rechargeable sensor networks\n(WRSNs). These techniques are aimed at increasing network lifetime by transferring power to end devices. Under these wireless\ntechniques, the incurred charging latency to replenish the sensor nodes is considered as one of the major issues in wireless\nsensor networks (WSNs). Existing recharging schemes rely on rigid recharging schedules to recharge a WSN deployment using\na single global charger. Although these schemes charge devices, they are not on-demand and incur higher charging latency\naffecting the lifetime of a WSN. This paper proposes a collaborative recharging technique to offload recharging workload to\nlocal chargers. Experiment results reveal that the proposed scheme maximizes average network lifetime and has better average\ncharging throughput and charging latency compared to a global charger-based recharging.
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